/*
 * Licensed to the Apache Software Foundation (ASF) under one   *
 * or more contributor license agreements.  See the NOTICE file *
 * distributed with this work for additional information        *
 * regarding copyright ownership.  The ASF licenses this file   *
 * to you under the Apache License, Version 2.0 (the            *
 * "License"); you may not use this file except in compliance   *
 * with the License.  You may obtain a copy of the License at   *
 *                                                              *
 *   http://www.apache.org/licenses/LICENSE-2.0                 *
 *                                                              *
 * Unless required by applicable law or agreed to in writing,   *
 * software distributed under the License is distributed on an  *
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
 * KIND, either express or implied.  See the License for the    *
 * specific language governing permissions and limitations      *
 * under the License.                                           *
 */ 
package org.apache.rat;

import java.io.InputStream;
import java.io.Reader;
import java.io.Writer;

import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;


class ReportTransformer implements Runnable {

    private final Writer out;
    private final Transformer transformer;
    private final Reader in;
    
    public ReportTransformer(final Writer out, final Reader style, 
            final Reader in) throws TransformerConfigurationException {
        this.out = out;
        transformer = TransformerFactory.newInstance().newTransformer(
                new StreamSource(style));
        this.in = in;
    }
    
    public ReportTransformer(final Writer out, final InputStream style, 
            final Reader in) throws TransformerConfigurationException {
        this.out = out;
        transformer = TransformerFactory.newInstance().newTransformer(
                new StreamSource(style));
        this.in = in;
    }
    
    public void run() {
        try {
            transform();
        } catch (TransformerException e) {
            throw new ReportFailedRuntimeException(e.getMessage(), e);
        }
    }

    public void transform() throws TransformerException {
        transformer.transform(new StreamSource(in), new StreamResult(out));
    }

}
